CA2353091A1 - Continuous process for irradiating of polytetrafluoroethylene (ptfe) - Google Patents

Continuous process for irradiating of polytetrafluoroethylene (ptfe) Download PDF

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Publication number
CA2353091A1
CA2353091A1 CA002353091A CA2353091A CA2353091A1 CA 2353091 A1 CA2353091 A1 CA 2353091A1 CA 002353091 A CA002353091 A CA 002353091A CA 2353091 A CA2353091 A CA 2353091A CA 2353091 A1 CA2353091 A1 CA 2353091A1
Authority
CA
Canada
Prior art keywords
ptfe
polytetrafluoroethylene
irradiating
continuous process
vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002353091A
Other languages
French (fr)
Other versions
CA2353091C (en
Inventor
Robert Luniewski
William B. Neuberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shamrock Technologies Inc
Original Assignee
Shamrock Technologies, Inc.
Robert Luniewski
William B. Neuberg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shamrock Technologies, Inc., Robert Luniewski, William B. Neuberg filed Critical Shamrock Technologies, Inc.
Publication of CA2353091A1 publication Critical patent/CA2353091A1/en
Application granted granted Critical
Publication of CA2353091C publication Critical patent/CA2353091C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/08—Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/05—Mixers using radiation, e.g. magnetic fields or microwaves to mix the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/406—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles with gas supply only at the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B01F33/833—Devices with several tools rotating about different axis in the same receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
    • B01F33/83613—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by grinding or milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
    • B29C2035/0877—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation using electron radiation, e.g. beta-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene

Landscapes

  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Disintegrating Or Milling (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processing Of Solid Wastes (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

A system for continuously processing PTFE by irradiation and grinding includes a processing vessel having first and second horizontally adjacent agitators in first and second transversely adjacent vessel portions.
The bottom of the vessel has a step between the portions whereat heated air is injected for agitating and grinding the PTFE.
CA002353091A 1998-12-09 1999-12-01 Continuous process for irradiating of polytetrafluoroethylene (ptfe) Expired - Fee Related CA2353091C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/208,117 1998-12-09
US09/208,117 US5968997A (en) 1998-12-09 1998-12-09 Continuous process for irradiating of polytetrafluorineethylene (PTFE)
PCT/US1999/028431 WO2000034300A1 (en) 1998-12-09 1999-12-01 Continuous process for irradiating of polytetrafluoroethylene (ptfe)

Publications (2)

Publication Number Publication Date
CA2353091A1 true CA2353091A1 (en) 2000-06-15
CA2353091C CA2353091C (en) 2008-08-12

Family

ID=22773250

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002353091A Expired - Fee Related CA2353091C (en) 1998-12-09 1999-12-01 Continuous process for irradiating of polytetrafluoroethylene (ptfe)

Country Status (9)

Country Link
US (2) US5968997A (en)
EP (1) EP1137657B1 (en)
JP (1) JP2002531645A (en)
AT (1) ATE252597T1 (en)
AU (1) AU1928900A (en)
BR (1) BR9916082B1 (en)
CA (1) CA2353091C (en)
DE (1) DE69912309T2 (en)
WO (1) WO2000034300A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6486481B1 (en) 1999-11-12 2002-11-26 Ausimont Usa, Inc. Vibratory table apparatus and associated equipment and methods for radiation treatment of polymeric materials
US6340718B1 (en) 2000-07-24 2002-01-22 Steris Inc Method of radiation treatment for fluoropolymer materials
EP1487905A4 (en) * 2002-03-14 2009-12-09 Shamrock Tech Inc Methods for producing submicron polytetrafluoroethylene powder and products thereof
US7152836B2 (en) * 2003-01-09 2006-12-26 Csav, Inc. Adjustable tilt mount
CA2514218C (en) * 2003-01-27 2009-04-21 Shamrock Technologies, Inc. Method for producing submicron polytetrafluoroethylene powder and products thereof
CN103170401B (en) * 2013-04-03 2015-11-18 太仓金凯特种线缆有限公司 Ultraviolet prepares the method for ultrafine PTFE powder in conjunction with hydrogen peroxide and carbon tetrachloride
US20150258551A1 (en) * 2014-03-13 2015-09-17 Steven Cottam Grinder Mill
CN108473688B (en) 2016-08-04 2021-09-14 大金工业株式会社 Process for producing low-molecular-weight polytetrafluoroethylene, and powder
US10870735B2 (en) 2016-08-04 2020-12-22 Daikin Industries, Ltd. Method for producing low molecular weight polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, and powder
CN110833789A (en) * 2019-11-27 2020-02-25 贵阳铭鼎农业科技有限公司 Pig feed production mixer

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116226A (en) * 1959-03-16 1963-12-31 Du Pont Irradiation of fluorocarbon copoluymers
NL294110A (en) * 1962-08-14
FR1437476A (en) * 1965-02-26 1966-05-06 Saint Gobain Techn Nouvelles Method and device for irradiating fluids or granular or powdery products by exposure to a source of ionizing radiation
US3617005A (en) * 1969-03-18 1971-11-02 Cypro Inc Comminuting method of and means for conditioning thermoplastic molding material
US4029870A (en) * 1970-02-03 1977-06-14 Imperial Chemical Industries Limited Tetrafluoroethylene polymers
US4036718A (en) * 1970-02-03 1977-07-19 Imperial Chemical Industries Limited Process for preparing a friable tetrafluoroethylene polymer powder from unsintered coagulated dispersion grade tetrafluoroethylene polymer
BE785797A (en) * 1971-07-02 1973-01-03 Ici Ltd TETRAFLUOROETHYLENE POLYMER COMPOSITIONS
US3766031A (en) * 1972-04-10 1973-10-16 Garlock Inc Process for non-destructive radiation degradation of polytetrafluoroethylene
DE2223550A1 (en) * 1972-05-15 1973-12-06 Hans-Joachim Dipl-Ing Selig Fluidised mixing bed - imparts additional transverse motion to material
US3840189A (en) * 1973-05-23 1974-10-08 Owatonna Mfg Co Feed mill and mixer
JPS5330673A (en) * 1976-09-03 1978-03-23 Meiki Seisakusho Kk Process for regenerating scraps of thermosetting resin
US4311570A (en) * 1978-02-21 1982-01-19 Imperial Chemical Industries Limited Chemical process on the surface of a rotating body
US4220511A (en) * 1979-03-12 1980-09-02 Radiation Dynamics, Inc. Treatment of sintered poly-tetrafluoroethylene with irradiation and heat to produce a grindable material
US4467969A (en) * 1979-05-23 1984-08-28 Standard Oil Company On-line reclaim system
US4777192A (en) * 1982-05-03 1988-10-11 Shamrock Chemicals Corporation Apparatus and method for radiation processing of materials
US4748005A (en) * 1982-05-03 1988-05-31 Shamrock Chemicals Corporation Apparatus and method for radiation processing of materials
US4577805A (en) * 1984-05-31 1986-03-25 Sperry Corporation Agricultural mixing and grinding machine
DE3912751C1 (en) * 1989-04-19 1990-09-27 Vetco Sanitec Gmbh, 3100 Celle, De
US5260351A (en) * 1989-04-24 1993-11-09 E. I. Du Pont De Nemours And Company Radiation curing of perfluoroelastomers
US5028010A (en) * 1989-12-18 1991-07-02 Itex Enterprises, Inc. Apparatus for mixing solid or semi-solid wastes with additives
WO1991011096A1 (en) * 1990-01-31 1991-08-08 Quedlinburger Fortech Gmbh Process and device for electron beam treatment of particulates
US5296113A (en) * 1990-02-26 1994-03-22 Luniewski Robert S Irradiation device for fluoropolymers
US5149727A (en) * 1990-02-26 1992-09-22 Medical Sterilization, Inc. Irradiation device for fluoropolymers
CA2038481C (en) * 1991-03-18 1993-07-06 Changize Sadr Method and apparatus for recycling thermoplastic containers
US5230476A (en) * 1991-05-31 1993-07-27 Marcus Rust Vertical grinding and mixing tower
US5253535A (en) * 1991-12-03 1993-10-19 E. I. Du Pont De Nemours And Company Apparatus and method for monitoring mass flow of solids
FR2685659B1 (en) * 1991-12-27 1994-09-23 Didier Lagneaux PROCESS FOR REGENERATING PLASTIC MATERIALS FOR THE MANUFACTURE OF COMPOSITE PLASTIC PRODUCTS FOR COMMON USE AND THE INSTALLATION IMPLEMENTING THE PROCESS.
US5732559A (en) * 1996-06-17 1998-03-31 Blentech Corporation Rotational resistance cryogenic control system for chilling in a vacuum tumbler or agitator blender
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US5882737A (en) * 1998-03-20 1999-03-16 Eckhoff; Paul S. Apparatus and method for radiation processing of materials

Also Published As

Publication number Publication date
JP2002531645A (en) 2002-09-24
DE69912309T2 (en) 2004-08-05
EP1137657A1 (en) 2001-10-04
DE69912309D1 (en) 2003-11-27
CA2353091C (en) 2008-08-12
WO2000034300A8 (en) 2001-05-31
BR9916082A (en) 2001-09-04
US6491243B2 (en) 2002-12-10
ATE252597T1 (en) 2003-11-15
WO2000034300A9 (en) 2001-05-10
US20020084369A1 (en) 2002-07-04
AU1928900A (en) 2000-06-26
WO2000034300A1 (en) 2000-06-15
BR9916082B1 (en) 2010-01-26
US5968997A (en) 1999-10-19
EP1137657B1 (en) 2003-10-22

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Effective date: 20181203